Quran Verses
43-Surah Az-Zukhruf ( The Gold Adornment ) 81
Say, [O Muhammad], ‘ If the Most Merciful had a son, then I would be the first of [his] worshippers.’
قُلْ إِن كَانَ لِلرَّحْمَٰنِ وَلَدٌ فَأَنَا أَوَّلُ الْعَابِدِينَ
Quran's Tafhim ( explanation)
*64) It means: "My rejection of somebody's being God's offspring and my refusal to worship those whom you regard as His offspring is not due to any stubbornness and obduracy. My reason for the refusal is only this that God has no son or daughter, and your such beliefs are against the reality; otherwise I am such a faithful servant of my Lord that if at all the reality had been the same as you state I would have submitted myself in worship before you. "